The Lab rates video cards into 5 classes. They setup your default viewer graphics preferences based on those classes.
There is an update coming to the GPU Table, which is what the viewers use to figure out what class your video card is in and choose your initial settings. We should see it in one of the viewer release candidates this week or next.
The GPU Table has this information:
| // Class Numbers: | ||
| 0 – Defaults to low graphics settings. | No shaders on by default | Not supported |
| 1 – Defaults to mid graphics settings. | Basic shaders on by default | Supported |
| 2 – Defaults to high graphics settings. | Atmospherics on by default. | Supported |
| 3 – Same as 2, but with lighting and shadows enabled. | Supported | |
| 4 – Same as 3, but with ambient occlusion enabled. | Supported | |
| 5 – Same as 4, but with shadows set to “Sun/Moon+Projectors.” | Supported | |
You can find a copy of the GPU Table in the viewer’s install folder. Its secret name is: gpu_table.txt. You can look up your model of video card to see how the Lab thinks it should be supported.


